Hand-wrench.



' L. BOSLEY.

HAND WRENCH.

APPLICATION rILnn 111111. 1, 1910.

1,004,353. Patented Sept. 26, 1911. Y

awe/whoa 11111110111 1 Law B05 ley.

UNITED STATES, PATENT OFFICE.

LEVI IBOSLEY, OF CEDARVILLE, MICHIGAN, ASSIGNOR 0F ONE-FOURTH TO HENRYP. HOSSACK AND WILLIAM D. HOSSACK, 0F CEDARVILLE, MICHIGAN.

HAND-WRENCH.

Specification of Letters Patent.

Patented Sept. 26, 1911.

To all whom it may concern:

Be it known that I, Lnvr BOSLEY, a citizen of the United States,residing at Oedarville, in the county of Mackinac and State of Michigan,have invented new and useful Improvements in Hand-Wrenches, of which thefollowing is a s ecification.

This invention re ates to improvements in hand wrenches and moreparticularly to the type of wrenchesknown as pivoted jaw wrenches.

One object of the invention is the provision of a wrench including apair of pivoted jaws and a handle united to said jaws in such mannerthat when turned it will operate to open and close said jaws.

With these and other objects in view, which will more fully hereinafterappear, the present invention consist-s in certain novel details ofconstruction and arrangement of parts, hereinafter fully described,illustrated in the accompanying drawings, and more particularly pointedout in the appended claim; it being understood that various changes inthe form, proportion, size, and minor details of the device may be made,within the scope of the appended claim, without departing from thespirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, forming a part of the specification;Figure1 is a side elevation of the device. Fig. 2 is a similar view of theopposite side. Fig. 3 is a sectional end elevation on the line 3--3 ofFig. 2 looking in the direction of the arrows.

Similar numerals of reference are employed to designate correspondingparts throughout.

The jaws of the wrench are designated by the numerals 5 and 6 and sincethese members are somewhat different in structure a detail descriptionof each will be given.

The jaw 5 which may be properly called the movable jaw is substantiallycrescentshaped in contour having on its concaved surface a plurality ofindentations constituting teeth 7, and further provided adja cent one ofits ends and on its convex surface with a lateral extension 8.

The jaw 6 comprises an elongated body corresponding in widthapproximately to the jaw 5 and curved inwardly from its inter- Imediateportion to one end, the said inwardly curved portion corresponding tothe shape of a crescent or substantially so, and provided on its innersurface with teeth 9. The intermediate port-ion of the jaw 6, isprovided on its inner face with a pair of spaced lugs 10 and 11, thespace therebetween receiving that end portion of the jaw 5 adjacent tothe lateral extension 8. The

end portion of the jaw 5 arranged between the lugs 10 and 11 is providedwith a transverse opening to aline with similar openings formed in thelugs 10 and 11, these openings receiving a pivot pin 12 upon WlllCh thejaws turn. That portion of the jaw 6 extending in advance of the lugs 10and 11 has its inner face reduced from the said lugs 10 and 11 to itsouter end, as shown at 13. This portion of the jaw projects considerablyin advance of the convex side of the jaw 5 when the said jaws are inclosed position, and is formed with an arcuate inner edge whichconstitutes a bearing surface for the handle, to be resently described.

The handle inc udes a shank portion 1 1, one end of which is formed toprovide a fixed jaw wrench the sides of which are designated by thenumerals 15 and 16. The opposite end portion of the shank terminates ina widened cam head which is ofiset slightl from the shank. Theprojecting side of the offset corresponds in length approximately to thelength of the reduced end 13, and when the jaws are in closed positionbears on the said bearing surface. The cam head is slightly concaved, asshown at 17 and bears on the convexed extremity of the lateral extension8 of the jaw 5 when the jaws are in closed position. The outer edge ofthe cam head of the handle 14: is formed with a convex surface to engagethe concave surface of the reduced end 13. Connection between the jaw 5and handle is established by means of a lug 18 one end of which ispivoted to one side of the lateral extension 8 of the jaw 5, while theopposite end is secured to one face of the head of the handle andadjacent to that side opposite to the side which bears on the bearingsurface 13. Connection between the handle and opposite jaw 6 isestablished by means of a strap 19 which straddles the portion of thejaw 6 extending rearwardly from the lugs 10 and 11 and has its oppositeterminals secured to the head and at a point directly below the point towhich the rear end of the lug 18 is secured.

With this construction it will be manifest that when the jaws are inclosed position and the handle turned rearwardly the jaw 5 will turn onits pivot 12 and also on the pivot uniting it with the lug 18. When thehandle is moved in the opposite direction the jaws will move to closedposition.

From the foregoing, it is evident that I have provided a device which iscomparatively simple in structure and inexpensive to manufacture,embodying few parts and these so arranged that the danger of derangementwill be reduced to a minimum.

I claim In a wrench, a pair of jaw members pivoted to each other betweentheir ends, one of said. members having a reduced end formed with anarcuate inner edge surface and the other member having its endterminating inwardly of said reduced end, a handle member pivoted to theshort end and formed with a cam offset on its pivoted end and having aconvex edge surface to con-' tact with the concave surface of thereduced end, whereby the pivoted movement of the handle member in onedirection will move the short end and the reduced end of the jaw membersapart and move the gripping ends of said jaw members toward each other,and a strap pivoted to the cam offset of the handle member and embracingthe reduced end of the jaw member to hold said reduced end and camoffset in normal contact with each other.

In testimony whereof I afliX my signature in presence of two witnesses.

Witnesses:

MAURICE E. NEWMAN, AUGUST WARD. 7

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. G. V l

LEVI BosLEYQ

